Investigations of the opto-dielectric effect on a nematic liquid crystal doped with a photo-active azo mesogen, Geetha G



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List of Publications

  1. Supramolecular Helical Fluid Columns from Self-Assembly of Homomeric Dipeptides, C. V. Yelamaggad, G. Shanker, R. V. Ramana Rao, D. S. Shankar Rao, S. Krishna Prasad, V. V. Suresh Babu, Chem. Eur. J., 14, 10462 (2008)

  2. Pretransitional behaviour in the vicinityof the isotropic–nematic transition of strongly polar compounds, S Sridevi, S Krishna Prasad, D S Shankar Rao and C V Yelamaggad, J. Phys.: Condens. Matter, 20, 465106 (2008).

  3. Electric-Field-Assisted Acceleration of the Photostimulated Nematic - Isotropic Transition, S. Krishna Prasad, Geetha G. Nair, V. Jayalakshmi, Adv. Mater. 20, 1363 (2008).

  4. Effect of the C-2 hydroxyl group on the mesomorphism of alkyl glycosides: synthesis and thermotropic behavior of alkyl 2-deoxy-d-arabino-hexopyranosides, M. K. Singh, N. Jayaraman, D.S. Shankar Rao, S. Krishna Prasad, Chemistry and Physics of Lipids, 155, 90 (2008).

  5. Cholesterol-based nonsymmetric liquid crystal dimers: an overview, C. V. Yelamaggad, G. Shanker, Uma S. Hiremath and S. Krishna Prasad, J. Mater. Chem., 18, 2927 (2008)

  6. Optically biaxial interdigitated smectic A phase: liquid crystalline dimeric bidentate ligands and their metal complexes, C. V. Yelamaggad, I.S. Shashikala, V. Padmini Tamilenthi, D. S. Shankar Rao, Geetha G. Nair and S. Krishna Prasad, J. Mater. Chem., 18, 2096 (2008). [Front Cover]

  7. Manifestation of Chiral Smectic C Phase in Diphenylbutadiene Cored Bolaamphiphilic Sugars, Suresh Das, N. Gopinathan, S. Abraham, N. Jayaraman, M. K. Singh, S. Krishna Prasad, D. S. Shankar Rao, Adv. Func. Mater. 18, 1632 (2008).

  8. Synthesis and mesogenic properties of β-tetrabrominated tetraalkyloxyporphyrins, P. Bhyrappa, C. Arunkumar, Babu Varghese, D. S. Shankar Rao and S. Krishna Prasad, Journal of Porphyrins and Phthalocyanines, 12, 54 (2008)

  9. Effect of aerosil dispersions on the photoinduced nematic–isotropic transition, V Jayalakshmi, Geetha G Nair and S Krishna Prasad, J. Phys.: Condens. Matter, 19, 226213 (2007)

  10. Evidence of Wormlike Micellar Behavior in Chromonic Liquid Crystals: Rheological, X-ray, and Dielectric Studies, S. Krishna Prasad, Geetha G. Nair, Gurumurthy Hegde and V. Jayalakshmi, J. Phys. Chem. B 111, 9741 (2007).

  11. Dependence of the thermal back relaxation time kinetics on the order parameter excess between the equilibrium and photo-stimulated states, V. Jayalakshmi, Geetha G. Nair and S. Krishna Prasad, Phys. Rev. E. 75, 031710 (2007)

  12. Non-equilibrium liquid crystalline layered phase stabilized by light, S. Krishna Prasad, Geetha G. Nair and Gurumurthy Hegde, J. Phys. Chem. 111, 345 (2007).

  13. Studies of the mesomorphic behavior of bivalent carbohydrate amphiphiles, N. Jayaraman, M. K. Singh, D. S. Shankar Rao and S. Krishna Prasad, J. Mater. Chem., 17, 2228 (2007).

  14. Frustrated Liquid Crystals: Synthesis and Mesomorphic Behavior of Unsymmetrical Dimers Possessing Chiral and Fluorescent Entities, C. V. Yelamaggad, N. L. Bonde, A.S. Achalkumar, D. S. Shankar Rao, S. Krishna Prasad, and A. K. Prajapati, Chem. Mater. 19, 2463 (2007)

  15. Monodispersive Linear Supermolecules Stabilizing Unusual Fluid Layered Phases, C.V.Yelamaggad, A.S. Achalkumar, D.S Shankar Rao and S.Krishna Prasad, Organic Letters, 14, 2641 (2007)

  16. Liquid crystal dimers possessing chiral rod-like anisometric segments: synthesis, characterization and electro-optic behaviour, C.V.Yelamaggad, I.S.Shashikala, U.S. Hiremath, D.S Shankar Rao and S.Krishna Prasad, Liq. Cryst., 34, 153(2007).

  17. Dielectric studies under high pressure on strongly polar liquid crystals exhibiting monolayer smectic A phase, K.L. Sandhya, D.S. Shankar Rao, S. Krishna Prasad, U.S. Hiremath, C.V. Yelamaggad, Thermochimica Acta, 452, 65 (2007).

  18. Blue Phase, Smectic Fluids, and Unprecedented Sequences in Liquid Crystal Dimers, C. V. Yelamaggad, I.S. Shashikala, G. Liao, D. S. Shankar Rao, S. Krishna Prasad, Q. Li and A. Jakli, Chem. Mater., 18, 6100 (2006).

  19. The biaxial smectic (SmAb) phase in nonsymmetric liquid crystal dimers comprising two rodlike anisometric segments: an unusual behavior, C. V. Yelamaggad, I.S. Shashikala, D. S. Shankar Rao, Geetha G. Nair and S. Krishna Prasad, J. Mater. Chem. 16, 4099 (2006).

  20. Investigations of the Opto-dielectric Effects in the Vicinity of the Smectic-A–Smectic-CA* Transition, Geetha G. Nair, Gurumurthy Hegde, S.Krishna Prasad and Y.S. Negi, J. Phys: Condensed Matter 18, 9415 (2006).

  21. Electrical conductivity and dielectric constant measurements of liquid crystal-gold nanoparticles composites, S. Krishna Prasad, K.L. Sandhya, Geetha G. Nair, Uma S. Hiremath,C.V. Yelamaggad and S. Sampath, Liquid Crystals, 33, 1121 (2006).

  22. Fluorine containing nonsymmetrical five-ring achiral banana-shaped compounds with columnar and synclinic antiferroelectric layered phases, C.V. Yelamaggad, I.S. Shashikala, Uma S. Hiremath, G. Liao, A. Jakli, D. S. Shankar Rao S.Krishna Prasad, Soft Matter, 2, 785 (2006)

  23. Photoinduced effects in the vicinity of the smectic-A-smectic-CA * transition: Polarization, tilt angle, and response time studies, Geetha G. Nair, Gurumurthy Hegde, S. Krishna Prasad, Chethan V. Lobo, and Y. S. Negi, Phys. Rev. E, 73, 011702 (2006)

  24. First liquid crystalline cuneanecaged derivatives: a structure–property relationship study, Gyula Bényei, István Jalsovszky, Dietrich Demus, Krishna Prasad, Shankar Rao, Anikó Vajda, Antal Jákli, Katalin FodorCsorba , Liquid Crystals, 33, 689 (2006)

  25. Ferroelectricity of a bent-core material with cholesteryl terminal chain, G. Liao, I. Shashikala, C. V. Yelamaggad, D. S. Shankar Rao, S. Krishna Prasad, and A. J. Jákli, Phys. Rev. E, 73, 051701 (2006)

  26. Experimental investigations on weakly polar liquid crystal-aerosil composites, Chethan V. Lobo, S. Krishna Prasad and C.V. Yelamaggad, J. Phys.: Condens. Matter. 18, 767 (2006).

  27. High pressure investigations of the photo-stimulated orientational ordering transition in a liquid crystal with photoactive dimeric molecules, Vivek Gupta, D.S. Shankar Rao, Chethan V. Lobo, S. Krishna Prasad, Uma S. Hiremath and C.V. Yelamaggad, Thermochimica Acta, 440, 205-211 (2006).

  28. Intercalated Smectic A Phases in Banana-Shaped Liquid Crystals with Carbonate End Groups, K.Fodor-Csorba, A Jakli, A.Vajda, S. Krishna Prasad, Doddamane S. Shankar Rao, R.Y. Dong, Jiadi Xu, and Giancarlo Galli, ChemPhysChem, 7, 2184 (2006).

  29. Novel liquid crystalline cuneane-caged derivatives: Structure property relationship study, Gyula Bényei, István Jalsovszky, Aniko Vajda, Antal Jákli, Dietrich Demus, Shankar Rao, Krishna Prasad, Katalin Fodor-Csorba, e-LC, December 2005

  30. Observation of a Chiral Smectic Phase in Azobenzene-Linked Bolaamphiphiles Containing Free Sugars, S. Abraham, S. Paul, G. Narayan, S. Krishna Prasad, D. S. S. Rao, N. Jayaraman, S. Das, Adv. Func. Mater., 15, 1579 (2005). [Inside Cover]

  31. Photoinduced effects in nematic liquid crystals, S. Krishna prasad, Geetha G. Nair, Gurumurthy Hegde, K. L. Sandhya, D. S. Shankar Rao, Chethan V. Lobo, C. V. Yelamaggad, Phase Transitions, 78, 443 (2005).

  32. Dynamic self-assembly of the liquid crystalline smectic A phase, S. Krishna Prasad, Geetha G. Nair and Gurumurthy Hegde, Adv. Mater. 17, 2086 (2005)

  33. Effect of pressure on the dynamics of the photo-stimulated orientational ordering transition in a liquid crystal, S. Krishna Prasad, Vivek Kumar Gupta, D.S. Shankar Rao and Chethan V. Lobo, Phys. Rev. E, 72, 021705 (2005)

  34. A photodriven dual-frequency addressable optical device, Gurumurthy Hegde, Geetha G. Nair, S. Krishna Prasad, and C. V. Yelamaggad, J. Appl. Phys. 97, 093105 (2005)

  35. Self-assembly of chiral mesoionic heterocycles into smectic phases: a new class of polar liquid crystal, C. V. Yelamaggad, M. Mathews, U.S. Hiremath, D. S. Shankar Rao and S. Krishna Prasad, Tetrahedron Letters, 46, 2623 (2005).

  36. Self-organization of mesomeric–ionic hybrid heterocycles into liquid crystal phases: a new class of polar mesogens, C.V. Yelamaggad, M.Mathews, U.S. Hiremath, D.S. Shankar Rao and S.Krishna Prasad, Chem. Comm., 1552 (2005)

  37. X-ray and dielectric measurements of the smectic A – hexatic B transition in bulk and confined geometries, Chethan V.Lobo, S.Krishna Prasad and D.S.Shankar Rao, Phys. Rev. E., 69, 051706 (2004).

  38. Polymer network for control of photoconductivity of a liquid crystal semiconductor, S. Krishna Prasad, Geetha G. Nair, Gurumurthy Hegde, Uma S. Hiremath and C.V. Yelamaggad, Liq.Cryst., 31, 1265 (2004).

  39. A Low-Molar-Mass, Monodispersive, Bent-Rod Dimer Exhibiting Biaxial Nematic and Smectic A Phases, C.V. Yelamaggad, S.Krishna Prasad, Geetha G. Nair, I.Shashikala, D.S. Shankar Rao, C. V. Lobo, S. Chandrasekhar, Angew. Chemie Int. Ed., 43, 3429 (2004).

  40. Self-assembly of C3h and C2 symmetric keto-enamine forms of tris(n-salicylideneanilines) into columnar phases: a new family of discotic liquid crystals, C. V. Yelamaggad, A.S. Achalkumar, D.S. Shankar Rao and S. Krishna Prasad, J. Am. Chem. Soc. Commun., 126, 6506 (2004).

  41. Influence of a long-chain alkane on the photoinduced nematic-isotropic transition, Geetha G. Nair, S. Krishna Prasad and Gurumurthy Hegde, Phys. Rev. E., 69, 021708 (2004).

  42. Photoinduced phase transitions in liquid crystalline systems , S. Krishna Prasad, Geetha G. Nair, K.L. Sandhya and D.S. Shankar Rao, Curr. Sci., 86, 815 (2004).

  43. Bent-core V-shaped mesogens consisting of salicylaldimine mesogenic segments: synthesis and characterization of mesomorphic behaviour, C.V.Yelamaggad, I.Shashikala, D.S.S.Rao and S. Krishna Prasad, Liq. Cryst., 31, 1027 (2004).

  44. Wide viewing and fast responding TN LCD, S. Chandrasekhar, V.N.Raja, S.Krishna Prasad and D.S.Shankar Rao, Mol. Cryst. Liq.Cryst., 410, 359 (2004).

  45. Effect of pressure on liquid crystalline dimers, K.L.Sandhya, D.S. Shankar Rao, S. Krishna Prasad, Uma S. Hiremath and C.V. Yelamaggad, Liq.Cryst., 30, 1351 (2003).

  46. Phase behaviour of thermotropic banana-shaped compounds under pressure, S. Krishna Prasad, Y. Maeda, D.S. Shankar Rao, S. Anitha Nagamani, Uma S. Hiremath and C.V.Yelamaggad, Liq.Cryst., 30, 1277 (2003).

  47. Enhanced dynamic response of the photoinduced nematic-isotropic transition in a polymer matrix, K.L.Sandhya, S. Krishna Prasad and Geetha G. Nair, Appl. Phys. Lett., 83, 2707 (2003).

  48. Anomalous increase of photocurrent anisotropy in a liquid crystalline binary mixture, K.L.Sandhya, Geetha G.Nair, S. Krishna Prasad, C.V.Yelamaggad and U.S. Hiremath, J. Appl. Phys., 92, 6987 (2002).

  49. Time-resolved measurements of the dynamics of the photoinduced smectic-C*- smectic-A transition, S. Krishna Prasad, K.L.Sandhya, D.S.Shankar Rao and Y.S.Negi, Phys. Rev. E., 67, 051701 (2003).

  50. In situ observation of the pressure-induced mesophase for 4’-n-hexadecyloxy-3’-nitrobiphenyl-4-carboxylic acid, Y. Maeda, S. Krishna Prasad, S. Kutsumizu and S. Yano, Liq.Cryst., 30, 7 (2003).

  51. Synthesis and thermal behavior of salicylaldimine-based liquid crystalline symmetrical dimmers, C.V.Yelamaggad, Manoj Mathews, Uma S.Hiremath, Geetha G. Nair, D.S.Shankar Rao and S.Krishna Prasad, Liq.Cryst., 30, 899 (2003).

  52. Novel chiral dimesogenic bidentate ligands and their Cu(II) and Pd(II) metal complexes, C.V.Yelamaggad, Uma S.Hiremath, S.Anitha Nagamani, D.S.Shankar Rao, S.Krishna Prasad, Nobuo Iyi and Taketoshi Fujita, Liq. Cryst., 30, 681 (2003).

  53. Electro-optic and viewing angle characteristics of a display device employing a discotic nematic liquid crystal, Geetha G Nair, D.S.Shankar Rao, S.Krishna Prasad, S.Chandrasekhar and S.Kumar, Mol. Cryst. Liq. Cryst., 397, 245 (2003).

  54. Columnar mesophase in a novel series of banana-shaped compounds consisting of functional nitro groups, Veena Prasad, D.S.Shankar Rao and S.Krishna Prasad, Mol. Cryst. Liq. Cryst., 397, 79/[379] (2003).

  55. High pressure investigations on the phase behaviour of discotic liquid crystals, D.S.Shankar Rao, S.Krishna Prasad, R.K.Bamezai and Sandeep Kumar, Mol. Cryst. Liq. Cryst., 397, 143/[443] (2003).

  56. Monodispersive unsymmetrical tetramers exhibiting a columnar phase, C.V.Yelamaggad, S.Anitha Nagamani, Uma S.Hiremath, D.S.Shankar Rao and S.Krishna Prasad, Mol. Cryt. Liq. Cryst., 397, 207/[507] (2003).

  57. Xray Studies on the columnar structures of discotic liquid crystals, S. Krishna Prasad, D.S. Shankar Rao, S. Chandrasekhar and Sandeep Kumar, Mol. Cryst. Liq. Cryst., 396, 121 (2003).

  58. Photoconductivity measurements in the discotic columnar phase of a few anthraquinone derivatives, K.L.Sandhya, S.Krishna Prasad, Geetha G.Nair and Veena Prasad, Mol. Cryst. Liq. Cryst,. 396, 113-119 (2003).

  59. Salicylaldimine-based symmetric dimers: synthesis and thermal behaviour, C.V.Yelamaggad, S.Anitha Nagamani, U.S.Hiremath, D.S.Shankar Rao and S.Krishna Prasad, Liq.Cryst., 29, 1401 (2002).

  60. Comparative Xray and dielectric measurements of smectic A-smectic C* transition in bulk and confined geometries, K.L.Sandhya, S.Krishna Prasad, D.S.Shankar Rao and Ch. Bahr, Phys. Rev. E, 66, 031710 (2002).

  61. Achiral banana-shaped mesogenic bidentate ligands and their Cu (II) and Pd (II) complexes, C.V. Yelamaggad, S. Anitha Nagamani, Geetha G. Nair, D. S. Shankar Rao, S. Krishna Prasad and A. Jakli, Liq. Cryst., 29, 1181 (2002).

  62. Effect of electric field on the TGBC* phase, G.G.Nair, S.Krishna Prasad, D.S.Shankar Rao and C.V.Yelamaggad, Ferroelectrics, 277, 117 (2002)

  63. Spacer parity dependence of photo-induced effects in liquid crystalline dimers, S. Krishna Prasad, K.L.Sandhya, Geetha G.Nair, C.V.Yelamaggad and U.S. Hiremath, J. Appl. Phys., 92, 838 (2002).

  64. The first examples of monodispersive liquid crystalline tetramers possessing four non-identical anisometric segments, C.V.Yelamaggad, S. Anitha Nagamani, U. S. Hiremath, D. S. Shankar Rao, S. Krishna Prasad, Liq. Cryst., 29, 231 (2002).

  65. Photo-induced effects in the vicinity of the smectic-C*- smectic-A transition,
    S. Krishna Prasad, K.L.Sandhya and Y.S.Negi, Phys, Rev. E, 65, 031718 (2002).

  66. Observation of a Reentrant Twist Grain Boundary Phase, D.S.Shankar Rao, S.Krishna Prasad, V.N. Raja, C.V.Yelamaggad, and S. Anita Nagamani, Phys. Rev. Lett., 87, 085504 (2001).

  67. Photoinduced nematic-isotropic phase transition: a case for the random-field Ising model, K.L.Sandhya, S.Krishna Prasad and Geetha G. Nair, Phys. Rev. E, 64, 041702 (2001).

  68. Dynamics of the two-dimensional melting transition of a liquid crystal confined in Anopore membranes, K.L.Sandhya, Geetha G.Nair, S.Krishna Prasad and Anjuli Khandelwal, Liq. Cryst., 28, 1847 (2001)

  69. Crystal Structure of an Unsymmetrical Dimeric Liquid Crystal with a Wide Temperature Range Chiral Smectic A Phase, N. K. Lokanath, M.A.Sridhar, J. Shashidhar Prasad, C.V.Yelamaggad D.S.Shankar Rao and S.Krishna Prasad, Mol. Cryst. Liq. Cryst., 364, 567 (2001).

  70. Phase behaviour of the discotic mesogen 2,3,6,7,10,11-hexahexylthio Triphenylene (HHTT) under hydrostatic pressure, Y. Maeda, D.S. Shankar Rao, S.Krishna Prasad, S.Chandrasekhar and Sandeep Kumar, Liq. Cryst., 28, 1679 (2001)

  71. Cholesterol-based linear trimesogens: synthesis and evaluation of mesomorphic behavior, C.V.Yelamaggad, S. Anita Nagamani, U.S. Hiremath D.S. Shankar Rao and S.Krishna Prasad, J. Chem. Research, 493 (2001).


  72. Unsymmetrical Trimesogens Exhibiting Undulated Twist Grain Boundary (UTGBC*) Mesophase, C.V.Yelamaggad, S. Anita Nagamani, U.S. Hiremath D.S. Shankar Rao and S.Krishna Prasad, Liq. Cryst., 28, 1581(2001).

  73. Molecular Design and Synthesis of The First examples of Novel Monodispersive Liquid Crystalline Tetramers Possessing Four Non-identical Anisometric Segments, C.V.Yelamaggad, S.Anitha Nagamani, U.S. Hiremath, D.S. Shankar Rao and S.Krishna Prasad, Liq. Cryst., 29, 231(2002).

  74. X-ray studies on the columnar structures of discotic liquid crystals, S Chandrasekhar, S.Krishna Prasad, D.S.Shankar Rao and V.S.K. Balagurusamy, Special issue on crystallography, Proc. INSA, Ed. Krishan Lal, PINSA 68 A, 175 (2002).

  75. Effect of pressure on the photoinduced nematic-isotropic phase transition, S.Krishna Prasad, D.S.Shankar Rao and P.Jeyagopal, PHYS. REV.E., 64, 011706 (2001).

  76. Electroclinic effect in unsymmetrical Dimeric Liquid Crystals composed of two non-identical chiral mesogenic entities, C.V.Yelamaggad, S.Anitha Nagamani, D.S.Shankar Rao, S.Krishna Prasad and U.S. Hiremath, MOL. CRYST. LIQ. CRYST., 363, 1 (2001).
  77. Effect of light on the polarization of a banana-shaped achiral compound doped with a photoactive azobenzene material, Geetha G.Nair, S.Krishna Prasad, Uma S.Hiremath and C.V.Yelamaggad, J. APPL. PHYS., 90, 48 (2001).

  78. Experimental studies on the B7 phase of a banana-shaped achiral compound, D.S Shankar Rao, Geetha G.Nair, S.Krishna Prasad, S. Anita Nagamani and C.V.Yelamaggad, Liq. Cryst., 28, pp1239-1243 (2001).


  79. Banana-shaped liquid crystalline compounds with an alkylene spacer, Veena Prasad, D.S.Shankar Rao and S.Krishna Prasad, LIQ. CRYST., 28, 761-767 (2001).

  80. A switchable salicylaldimine-based achiral bent-shaped mesogen, synthesis and characterization, C.V.Yelamaggad, Uma S. Hiremath, S.Anitha Nagamani, D.S. Shankar Rao and S.Krishna Prasad, J. MATER. CHEM., 11, 1818 (2001).




  1. High Pressure investigations on a Liquid Crystalline Cubic Phase, S.Krishna Prasad, 5th National Conference on High Pressure Science and Technology, March 1-3, 2000, Chennai, India.

  2. Optical generation of inversion walls in nematic liquid crystals, I. Janossy and S.Krishna Prasad, PHYS. REV. E , 63, 041705 1-7 (2001).

  3. A Novel class of Banana-shaped azo compounds exhibiting antiferroelectric switching behaviour, Veena Prasad, D.S.Shankar Rao and S.Krishna Prasad, LIQ. CRYST., 28, p643-646, (2001).

  4. Effect of photo-controlled nanophase segregation in a re-entrant nematic liquid crystal, S.Krishna Prasad and Geetha G.Nair, ADV.MATER. 13, 40 (2000).

  5. Investigations of the non-linear dielectric response in the Smectic C*, Smectic I* and Smectic F* phases of a chiral liquid crystal., S.Krishna Prasad and Geetha G.Nair , MOL. CRYST. LIQ. CRYST., 350, 199 (2000).

  6. Investigations of the opto-dielectric effect on a nematic liquid crystal doped with a photo-active azo mesogen, Geetha G.Nair, S.Krishna Prasad and C.V.Yelamaggad, J. APPL. PHYS. 87, 2084 (2000).

  7. Chiral twisting of a Smectic-A Liquid Crystal, M.S.Spector, S.Krishna Prasad, B.T.Weslowski, R.D.Kamien, J.V.Selinger, B.R.Ratna and R.Shashidhar, PHYS.REV.E, 61, 3977 (2000)

  8. Ferroelectric switching in a novel bent-shaped molecule having two non-mesogenic units linked by an alkylene spacer, Veena Prasad, D.S.Shankar Rao and S.Krishna Prasad, LIQ. CRYST. 27, 585-590 (2000)

  9. Novel heptasubstituted triphenylene discotic liquid crystals, Sandeep Kumar, M.Manickam, Sanjay K.Varshney, D.S.Shankar Rao and S.Krishna Prasad, J. Mater. Chem., 10, p.2483-2489 (2000).

  10. First Observation of a Photo-induced Transition to a More Ordered Phase in a System Exhibiting Reentrant Nematic – Smectic A Phase Sequence, S.Krishna Prasad and Geetha G.Nair, MOL. CRYST. LIQ. CRYST., 350, 79 (2000)

  11. Recent developments in discotic liquid crystals, S.Chandrasekhar and S.Krishna Prasad, Invited article in CONTEMP. PHYS., 40, 237 (1999)

  12. Dielectric and high-pressure investigations on a thermotropic cubic mesophase, D.S.Shankar Rao, S.Krishna Prasad, Veena Prasad and Sandeep Kumar, PHYS. REV.E., 59, 5572 (1999).

  13. A wide viewing angle LCD using a discotic nematic material, S.Chandrasekhar, S.Krishna Prasad, Geetha G.Nair, D.S.Shankar Rao, Sandeep Kumar and M.Manickam, paper presented at the Eurodisplay Conference held in Berlin, 6-9 September 1999, p.9-11 (1999), published in the proceedings of the conference.

  14. New branched chain tricycloquinazoline: a room temperature electron deficient discotic system, Sandeep Kumar, D.S.Shankar Rao and S.Krishna Prasad, J.MAT. CHEM., 9, 2751 (1999)

  15. A Novel Calamitic Liquid Crystalline Oligomer Containing Three Non- identical Mesogenic Entities: Synthesis and Characterisation, C.V.Yelamaggad, Uma S.Hiremath, D.S.Shankar Rao and S.Krishna Prasad, CHEM. COMM., 57, (2000).

  16. Cholesterol-based Unsymmetrical Dimeric Liquid Crystal with Wide Temperature Range Chiral Smectic A Phase, C.V.Yelamaggad, D.S.Shankar Rao and S.Krishna Prasad (communicated to MOL. CRYST. LIQ. CRYST.).

  17. Non-linear dielectric response of a ferroelectric liquid crystal, S.Krishna Prasad, Geetha G.Nair and D.S.Shankar Rao, LIQ. CRYST., 26, 1587 (1999).

  18. Quasi-One Dimensional Electrical Conductivity and Thermoelectric Power Studies on a Discotic Liquid Crystal, V.S.K.Balagurusamy, S.Krishna Prasad, S.Chandrasekhar, Sandeep Kumar, M.Manickam and C.V.Yelamaggad, Proceedings of the Golden Jubilee Meeting on Liquid Crystals and other soft Materials, Raman Research Institute, 1998, PRAMANA, 53(l), 5-11 (1999).

  19. Synthesis and Characterization of Some New Dimesogenic compounds, C.V.Yelamaggad, A.Srikrishna, D.S.Shankar Rao and S.Krishna Prasad, LIQ. CRYST., 26, 1545 (1999).

  20. Dielectric studies on strongly polar discotic liquid crystals, Geetha G.Nair, S.Krishna Prasad, Sandeep Kumar and M.Manickam, MOL. CRYST. LIQ. CRYST., 319, 89 (1998).

  21. High pressure studies on hexa-n-alkoxy triphenylene homologous series, D.S.Shankar Rao, V.K.Gupta, S.Krishna Prasad, M.Manickam and Sandeep Kumar, MOL. CRYST. LIQ. CRYST., 319, 193 (1998).

  22. A thermotropic biaxial nematic liquid crystal, S.Chandrasekhar, Geetha G.Nair, D.S.Shankar Rao, S.Krishna Prasad, K.Praefcke and D.Blunk, presented at the Eringen Medal Symposium, Society for Engg. Science, held in honour of Nobel Laureate Professor Pierre-Gilles de Gennes, at Pullman, CURR. SCI., 75, 10, (1998)

  23. Dielectric investigations of the dynamics of the hexatic-hexatic transition in a chiral liquid crystal, S.Krishna Prasad, Geetha G.Nair and Rajnikant, PHYS. REV. E., 57, 1789 (1998).

  24. Synthesis and mesomorphic properties of some esters of trans-4-n-alkoxy methyl cinnamic acids exhibiting ferroelectric and antiferroelectric phases, N.Kasturaiah, B.K.Sadashiva, S.Krishna Prasad, and Geetha G.Nair, LIQ. CRYST., 24, 639 (1998).

  25. Xray and high pressure studies on a compound exhibiting ferro-, ferri and anti-ferroelectric smectic phase, S.Krishna Prasad, Published in the proceedings of National Seminar on Liquid Crystals, Patiala, November 1-3, 1996, p.35 (1998).

  26. High pressure investigations on liquid crystals: some recent results, S.Krishna Prasad, invited talk at the Fourth National Conference on High Pressure Science and Technology, Kalpakkam, Sept. 11-13, Published in 'Advances in High Pressure Science & Technology, Eds.: M.Yousuf, N.Subramanian K.Govindarajan, Universities Press, p.246-254 (1997).

  27. Schlieren textures in free-standing nematic films: evidence of biaxiality, S.Chandrasekhar, Geetha G.Nair, D.S.Shankar Rao, S.Krishna Prasad, K.Praefcke and D.Blunk, LIQ. CRYST., 22, 67 (1998).

  28. Xray, dielectric and high pressure studies on a compound exhibiting ferro-, ferri- and antiferroelectric smectic phases, D.S.Shankar Rao, S.Krishna Prasad, S.Chandrasekhar, S.Mery and R.Shashidhar, Invited article in the volume honouring of Prof. A.Saupe on his 70th Birthday proceedings, Mol. Cryst. Liq. Cryst., 292, 301 (1997).

  29. Influence of bond orientational order on the switching time of ferroelectric smec- tics, S.Krishna Prasad, S.Chandrasekhar and Geetha G.Nair, presented at the International Symposium on "Liquid Crystals & Supramolecular Order", Bangalore 1996, Mol. Cryst. Liq. Cryst., 288, 63 (1996).

  30. Ferroelectric and antiferroelectric liquid crystalline phases in some pyridine carboxylic acid derivatives, N.Kasturaiah, B.K.Sadashiva, S.Krishna Prasad and Geetha G.Nair, J.Mat. Chem., 6, 1619(1996).

  31. Comparative study of the collective mode dynamics in FLC monomers and their corresponding copolymers, S.Krishna Prasad, D.S.Shankar Rao, S.M.Khened, S.Chandrasekhar, J.Naciri and R.Shashidhar, invited talk at the International Symposium on "Dynamics of Complex Systems", Calcutta 1995, Physica, 224, 24 (1996).

  32. Measurements of pitch of a ferroelectric liquid crystal at high pressures, S.Krishna Prasad, Geetha G.Nair and S.Chandrasekhar), Mol. Cryst. Liq. Cryst., 263, p.311-323 (1995).

  33. Pressure induced twist grain boundary phase, S.Krishna Prasad, Geetha G.Nair, S.Chandrasekhar and J.W.Goodby, Mol. Cryst. Liq. Cryst., 260, p.387 (1995).

  34. Observation of a smectic C*-smectic 1* critical point in a binary system using polarisation measurements, S-Krishna Prasad, Geetha G.Nair and S. Chandrasekhar, invited article for the special issue on Liquid Crystals, J. Mat. Chem., 5, 2253 (1995).

  35. Observation of the smectic-C - smectic-I critical point, S.Krishna Prasad, D.S.Shankar Rao, S.Chandrasekhar, M.E.Neubert and J.W.Goodby, Phys. Rev. Lett., 74, p.270 (1995).

  36. Experimental study of the smectic A-smectic C transition in bilayer, partially bilayer and monolayer phases, S.Krishna Prasad, D.S.Shankar Rao, V.N.Raja, S.Chandrasekhar, G.Heppke and M.E.Neubert, Mol. Cryst. Liq. Cryst., 238, 241 (1994).

  37. Phase diagram involving the twist grain boundary phase in the vicinity of a virtual cholesteric-smectic A-smectic C* point, S.Krishna Prasad, V.N.Raja, Geetha G.Nair and J.W.Goodby, Mol. Cryst. Liq. Cryst., 250, 239 (1994).

  38. Dielectric Study of a Ferroelectric Liquid Crystal at High Pressure, S.Krishna Prasad, S.M.Khened and S.Chandrasekhar, in Modern Topics in Liquid Crystals, Ed., A. Buka, (World Scientific, Singapore, 1994), p.285.

  39. High pressure studies on ferroelectric liquid crystals, S.Krishna Prasad, invited talk at the First National Conference on High Pressure Science & Technology, Bangalore 1994, Published in "Advances in High Pressure Science & Technology, Eds.: A.K.Singh, Tata McGraw-Hill, New Delhi (1994).

  40. Dielectric studies in the vicinity of the A - C* transition, S.Krishna Prasad, S.M.Khened, V.N.Raja, S.Chandrasekhar and B-Shivakumar, Ferroelectrics, 138, 37 (1993).

  41. Electroclinic materials with large induced tilt angles, B.R.Ratna, C.P.Crawford, S.Krishna Prasad, J.Naciri, P.Keller and R.Shashidhar, Ferroelectrics, 148, 425 (1993).

  42. High Pressure Studies on Ferroelectric Liquid Crystals, S.Krishna Prasad, S.M.Khened and S.Chandrasekhar, Ferroelectrics, 147, 351(1993).

  43. Ferroelectric Liquid Crystalline Polymers with Large Pyroelectric Coefficients for Infrared Detectors, J.Ruth, B.R.Ratna, J.Naciri, R.Shashidhar, S.Krishna Prasad, D.S.Shankar Rao and S.Chandrasekhar, in Liquid Crystal Materials, Devices and Applications 11, Ed.U.Efron and M.D.Wand, Proc. SPIE, 1911, 104(1993).

  44. Phase diagram exhibiting a Smectic A-Smectic C-Smectic F meeting point, V.N.Raja, D.S.Shankar Rao and S.Krishna Prasad, Phys. Rev. A (Rapid Commun.), 46, 726(1992).

  45. High Precision density studies near the Smectic A-nematic trieritical point, V.N.Raja, S.Krishna Prasad, D.S.Shankar Rao and S.Chandrasekhar, Liq. Cryst., 12, 239(1992).

  46. Comparative study of the Dielectric Properties of a Copolymer and the Constituent Monomer Units, D.S.Shankar Rao, S.Krishna Prasad, S.Chandrasekhar, J.Naciri, B.R.Ratna and R.Shashidhar, Presented at the 14th International Liquid Crystal Conference, Pisa, 1992.

  47. Dielectric studies of Goldstone mode and soft mode in the vicinity of the A-C* transition, S.M.Khened, S.Krishna Prasad, B.Shivkumar and B.K.Sadashiva, J. Physique, 11, 1, 171(1991).

  48. High Pressure Studies of Materials Exhibiting Fluid to Hexatic Phase Transitions in Liquid Crystals, D.S.Shankar Rao, V.N.Raja, S.Krishna Prasad, S.Chandrasekhar, J.W.Goodby and M.E.Neubert, in Recent Trends in High Pressure Research, Proc. of the XIII AIRAPT Int. Conf. on High Pressure Science and Technology, Ed.A.K.Singh,(Oxford & IBH, New Delhi, 1991), p.520.

  49. Smectic A-Smectic C-Hexatic B Meeting Point at High Pressure - A New Muticritical Point, Geetha G.Nair, V.N.Raja, S.Krishna Prasad, S.Chandrasekhar and B.K.Sadashiva, in Recent Trends in High Pressure Research, Proc. of the XIII AIRAPT Int. Conf. on High Pressure Science and Technology, (Oxford & IBH, New Delhi, 1991), p.523.

  50. Rotational Viscosity in the Ferroelectric C* Phase-A High Pressure Study, S.M.Khened, S.Krishna Prasad, V.N.Raja, S.Chandrasekhar and B.Shivkumar, in Recent Trends in High Pressure Research, Proc. of the XIII AIRAPT Int. Conf. on High Pressure Science and Technology, (Oxford & IBH, New Delhi, 1991), p.526.

  51. Effect of Pressure on the Spontaneous Polarization the Critical Unwinding Field and the Transverse Dielectric Constant in Ferroelectric Liquid Crystals, S.Krishna Prasad, S.M.Khened, V.N.Raja, S.Chandrasekhar and B.Shivkumar, in Recent Trends in High Pressure Research, Proc. of the XIII AIRAPT Int. Conf. on High Pressure Science and Technology, (Oxford & IBH, New Delhi, 1991), p.529.

  52. Ferroelectric Liquid Crystal Derived from trans-p-n-Alkoxycinnamic Acids, B.Shivkumar, B.K.Sadashiva, S.Krishna Prasad and S.M.Khened, Ferroelectrics, 114, 273(1991).

  53. Effect of the I* Phase Temperature Range on the Nature of the Tilted Fluid to Hexatic Transition, V.N.Raja, S.Krishna Prasad, D.S.Shankar Rao, J.W.Goodby, M.E.Neubert, Ferroelectrics, 121, 235(1991).

  54. High Pressure Studies on Ferroelectric Liquid Crystals, S.M.Khened, S.Krishna Prasad, V.N.Raja, S.Chandrasekhar and B.Shivkumar, Ferroelectrics, 121, 307(1991).

  55. Measurement of Rotational Viscosity in the Smectic C* Phase, S.Krishna Prasad, S.M.Khened, V.N.Raja and B.Shivkumar, Ferroetectrics, 121, 319(1991).

  56. Experimental Studies in the Vicinity of the C*-I* Transition, V.N.Raja, S.Krishna Prasad, S.M.Khened and D.S.Shankar Rao, Ferroelectrics, 121, 343(1991).

  57. Dielectric Behavior Near a Smectic Ad-Smectic A2 Critical Point, D.S.Shankar Rao, S. Krishna Prasad, V.N.Raja, S.Pfeiffer,S.Quentel and G.Heppke, Mol.Cryst Liq.Cryst., 198, 291 (1991).

  58. On the Variation of Pitch and Polarisation-Tilt Coupling in Chiral Smee- tic C, S.Krishna Prasad and Geetha G.Nair, Mol.Cryst.Liq.Cryst., 202, 91(1991).

  59. Temperature range of the Smectic-A phase and its effect on the Smectic- A-Smectic-C transition, S.Krishna Prasad, V.N.Raja, D.S.Shankar Rao, Geetha G.Nair and M.E.Neubert, Phys. Rev. A (Rapid Commun.), 42, 2479(1990).

  60. X-ray Studies near the Ad-A2 Critical Point in a Binary system of Suc- cessive Homologues, S.Quentel, G.Heppke, S.Krishna Prasad, S.Pfeiffer and R.Shashidhar, Mol.Cryst.Liq.Cryst. Letters, 7, 85(1990).

  61. Spontaneous Polarization and Rotational Viscosity Measurements on Ferroelectric Liquid Crystals Derived from trans-p-n-alkoxycinnamic Acids, S.Krishna Prasad, S.M.Khened, S.Chandrasekhar, B.Shivkumar and B.K.Sadashiva, Mol.Cryst.Liq.Cryst., 182B, 313(1990).

  62. The Effect of Pressure on the Main and Pre-transitions in DMPC, DSPC and DAPC, S.Krishna Prasad, S.Chandrasekhar, R.Shashidhar and B.P.Gaber, presented at the Biophysics Meeting, Baltimore,1989.

  63. Evidence of a first-order smectic A-smectic C* transition and its approach to tricritical behavior, B.R.Ratna, R.Shashidhar, Geetha G.Nair and, S.Krishna Prasad, Ch.Bahr and G.Heppke, Phys. Rev. A, 37, 1824 (1988).

  64. Mean-Field to Tricritical Crossover Behavior near the Smectic A- Smectic C* Tricritical Point, R.Shashidhar, B.R.Ratna, Geetha G.Nair and, S.Krishna Prasad, Ch.Bahr and G.Heppke, Phys. Rev. Lett., 61, 547(1988).

  65. Smectic-Ad – Smectic –A2 critical point, R. Shashidhar,B. R. Ratna, S. Krishna Prasad, S. Somasekhara and G. Heppke, Phys. Rev. Lett., 59, 1209(1987).

  66. Evidence of Continuous Evolution of Smectic A2 from Smectic Ad, S.Krishna Prasad, R.Shashidhar, B.R.Ratna and B.K.Sadashiva, Liq. Cryst., 2, 111(1987).

  67. Pressure studies on two hydrated phospholipids 1,2-dimyristoyl-phosphatidylcholine and 1,2-dipalmitoyl phosphatidylcholine, S. Krishna Prasad, R. Shashidhar, B.P.Gaber and S. Chandrasekhar, Chemistry and Physics of Lipids, 143, 227 (1987).

  68. Xray Studies on Bilayer Smectic A(A2) and Bilayer Smectic C(C2) Phases, R.Shashidhar, K.A.Suresh, B.R.Ratna, S.Krishna Prasad, Ch.Bahr, A.Oestreicher and G.Heppke, Mol.Cryst.Liq.Cryst. Letters, 1, 89(1985).

  69. Ad-Ad Transition in a Binary Liquid Crystal System, R.Shashidhar, B.R.Ratna and S.Krishna Prasad, Mol.Cryst.Liq.Cryst., 130, 179(1985).

  70. Effect of Pressure on Strongly Polar Liquid Crystals, S.Krishna Prasad, S.Pfeiffer, G.Heppke and R.Shashidhar, Z.Naturforsch, 40a, 632 (1985).

  71. Experimental studies on a triply reentrant mesogen R.Shashidhar, B.R.Ratna, V.Surendranath, V.N.Raja, S.Krishna Prasad and C.Nagabhushan, J.Physique Lett., 46, L-445 (1985).

  72. Experimental studies on a terminally nitro substituted compound with a latent reentrant nematic phase, B.R. Ratna, S. Krishna Prasad, R. Shashidhar, G. Heppke and S. Pfeiffer, Mol.Cryst.Liq.Cryst., 124, 21 (1985).

  73. Nematic-smectic A-smectic C multicritical point in a single component system, R. Shashidhar, B.R.Ratna and S. Krishna Prasad, Phys. Rev. Lett., 53, 2141 (1984).

  74. High Pressure study of phase transitions in DMPC-Water system, R.Shashidhar, B.P.Gaber, S.Krishna Prasad and S.Chandrasekhar, , Mol.Cryst.Liq.Cryst., 110, 153(1984).

  75. Pressure Studies on Ferroelectric Liquid Crystals, S.Krishna Prasad, B.R.Ratna, R.Shashidhar, and V. Surendranath, Ferroelectrics, 58, 1 (1984).

  76. A New Kind of A-A Transition: Studies on Binary Mixtures of Terminally Substituted Cyano and Nitro Compounds, R.Shashidhar, B.R.Ratna and S.Krishna Prasad, Mol.Cryst.Liq.Cryst. Letters, 102, 105(1984).

  77. Synthesis and Miscibility Studies of Some Phenyl Cinnamoyloxyben- zoate Derivatives, M.Subramanya Raj Urs, B.K.Sadashiva, K.A.Suresh and S.Krishna Prasad, Mol.Cryst.Liq.Cryst., 103, 235(1983).

  78. High Pressure Studies on Partially Bilayer and Monolayer Smectics, S.Krishna Prasad, R.Shashidhar, K.A.Suresh, A.N.Kalkura, G.Heppke and R.Hopf, Mol.Cryst.Liq.Cryst., 99, 185(1983).

  79. Pressure Studies on 7S5, 8S5 and their Mixtures, A.N.Kalkura, S.Krishna Prasad and R.Shashidhar, Mol.Cryst.Liq.Cryst., 99, 193(1983).

  80. The Topology of the P-T Diagram of DOBBCA in the Vicinity of the Reentrant Nematic-Smectic C-Smectic A Multicritical Point, R.Shashidhar, S.Krishna Prasad and S.Chandrasekhar, Mol.Cryst.Liq.Cryst., 103, 137(1983).


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